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<title>HandlerWrapper (ExoPlayer library)</title>
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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">com.google.android.exoplayer2.util</a></div>
<h2 title="Interface HandlerWrapper" class="title">Interface HandlerWrapper</h2>
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<pre>public interface <span class="typeNameLabel">HandlerWrapper</span></pre>
<div class="block">An interface to call through to a <a href="https://developer.android.com/reference/android/os/Handler.html" title="class or interface in android.os" class="externalLink"><code>Handler</code></a>. Instances must be created by calling <a href="Clock.html#createHandler(android.os.Looper,android.os.Handler.Callback)"><code>Clock.createHandler(Looper, Handler.Callback)</code></a> on <a href="Clock.html#DEFAULT" target="_top"><code>Clock.DEFAULT</code></a> for all non-test cases.</div>
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<table class="memberSummary">
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<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Interface</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a></span></code></th>
<td class="colLast">
<div class="block">A message obtained from the handler.</div>
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<h3>Method Summary</h3>
<table class="memberSummary">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getLooper()">getLooper</a></span>()</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#getLooper()" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.getLooper()</code></a>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#hasMessages(int)">hasMessages</a></span>&#8203;(int&nbsp;what)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#hasMessages(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.hasMessages(int)</code></a>.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#obtainMessage(int)">obtainMessage</a></span>&#8203;(int&nbsp;what)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int)</code></a>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#obtainMessage(int,int,int)">obtainMessage</a></span>&#8203;(int&nbsp;what,
             int&nbsp;arg1,
             int&nbsp;arg2)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,int,int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, int, int)</code></a>.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#obtainMessage(int,int,int,java.lang.Object)">obtainMessage</a></span>&#8203;(int&nbsp;what,
             int&nbsp;arg1,
             int&nbsp;arg2,
             <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;obj)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,int,int,java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, int, int, Object)</code></a>.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#obtainMessage(int,java.lang.Object)">obtainMessage</a></span>&#8203;(int&nbsp;what,
             <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;obj)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, Object)</code></a>.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#post(java.lang.Runnable)">post</a></span>&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#post(java.lang.Runnable)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.post(Runnable)</code></a>.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#postAtFrontOfQueue(java.lang.Runnable)">postAtFrontOfQueue</a></span>&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#postAtFrontOfQueue(java.lang.Runnable)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.postAtFrontOfQueue(Runnable)</code></a>.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#postDelayed(java.lang.Runnable,long)">postDelayed</a></span>&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable,
           long&nbsp;delayMs)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#postDelayed(java.lang.Runnable,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.postDelayed(Runnable, long)</code></a>.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeCallbacksAndMessages(java.lang.Object)">removeCallbacksAndMessages</a></span>&#8203;(<a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;token)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#removeCallbacksAndMessages(java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.removeCallbacksAndMessages(Object)</code></a>.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeMessages(int)">removeMessages</a></span>&#8203;(int&nbsp;what)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#removeMessages(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.removeMessages(int)</code></a>.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendEmptyMessage(int)">sendEmptyMessage</a></span>&#8203;(int&nbsp;what)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessage(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessage(int)</code></a>.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendEmptyMessageAtTime(int,long)">sendEmptyMessageAtTime</a></span>&#8203;(int&nbsp;what,
                      long&nbsp;uptimeMs)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessageAtTime(int,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessageAtTime(int, long)</code></a>.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendEmptyMessageDelayed(int,int)">sendEmptyMessageDelayed</a></span>&#8203;(int&nbsp;what,
                       int&nbsp;delayMs)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessageDelayed(int,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessageDelayed(int, long)</code></a>.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#sendMessageAtFrontOfQueue(com.google.android.exoplayer2.util.HandlerWrapper.Message)">sendMessageAtFrontOfQueue</a></span>&#8203;(<a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;message)</code></th>
<td class="colLast">
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendMessageAtFrontOfQueue(android.os.Message)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendMessageAtFrontOfQueue(android.os.Message)</code></a>.</div>
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<h3>Method Detail</h3>
<a id="getLooper()">
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<h4>getLooper</h4>
<pre class="methodSignature"><a href="https://developer.android.com/reference/android/os/Looper.html" title="class or interface in android.os" class="externalLink" target="_top">Looper</a>&nbsp;getLooper()</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#getLooper()" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.getLooper()</code></a>.</div>
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<h4>hasMessages</h4>
<pre class="methodSignature">boolean&nbsp;hasMessages&#8203;(int&nbsp;what)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#hasMessages(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.hasMessages(int)</code></a>.</div>
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<h4>obtainMessage</h4>
<pre class="methodSignature"><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;obtainMessage&#8203;(int&nbsp;what)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int)</code></a>.</div>
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<pre class="methodSignature"><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;obtainMessage&#8203;(int&nbsp;what,
                                     @Nullable
                                     <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;obj)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, Object)</code></a>.</div>
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<pre class="methodSignature"><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;obtainMessage&#8203;(int&nbsp;what,
                                     int&nbsp;arg1,
                                     int&nbsp;arg2)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,int,int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, int, int)</code></a>.</div>
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<h4>obtainMessage</h4>
<pre class="methodSignature"><a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;obtainMessage&#8203;(int&nbsp;what,
                                     int&nbsp;arg1,
                                     int&nbsp;arg2,
                                     @Nullable
                                     <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;obj)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#obtainMessage(int,int,int,java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.obtainMessage(int, int, int, Object)</code></a>.</div>
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<h4>sendMessageAtFrontOfQueue</h4>
<pre class="methodSignature">boolean&nbsp;sendMessageAtFrontOfQueue&#8203;(<a href="HandlerWrapper.Message.html" title="interface in com.google.android.exoplayer2.util">HandlerWrapper.Message</a>&nbsp;message)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendMessageAtFrontOfQueue(android.os.Message)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendMessageAtFrontOfQueue(android.os.Message)</code></a>.</div>
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<h4>sendEmptyMessage</h4>
<pre class="methodSignature">boolean&nbsp;sendEmptyMessage&#8203;(int&nbsp;what)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessage(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessage(int)</code></a>.</div>
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<h4>sendEmptyMessageDelayed</h4>
<pre class="methodSignature">boolean&nbsp;sendEmptyMessageDelayed&#8203;(int&nbsp;what,
                                int&nbsp;delayMs)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessageDelayed(int,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessageDelayed(int, long)</code></a>.</div>
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<h4>sendEmptyMessageAtTime</h4>
<pre class="methodSignature">boolean&nbsp;sendEmptyMessageAtTime&#8203;(int&nbsp;what,
                               long&nbsp;uptimeMs)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#sendEmptyMessageAtTime(int,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.sendEmptyMessageAtTime(int, long)</code></a>.</div>
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<h4>removeMessages</h4>
<pre class="methodSignature">void&nbsp;removeMessages&#8203;(int&nbsp;what)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#removeMessages(int)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.removeMessages(int)</code></a>.</div>
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<pre class="methodSignature">void&nbsp;removeCallbacksAndMessages&#8203;(@Nullable
                                <a href="https://developer.android.com/reference/java/lang/Object.html" title="class or interface in java.lang" class="externalLink" target="_top">Object</a>&nbsp;token)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#removeCallbacksAndMessages(java.lang.Object)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.removeCallbacksAndMessages(Object)</code></a>.</div>
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<pre class="methodSignature">boolean&nbsp;post&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#post(java.lang.Runnable)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.post(Runnable)</code></a>.</div>
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<pre class="methodSignature">boolean&nbsp;postDelayed&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable,
                    long&nbsp;delayMs)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#postDelayed(java.lang.Runnable,long)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.postDelayed(Runnable, long)</code></a>.</div>
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<pre class="methodSignature">boolean&nbsp;postAtFrontOfQueue&#8203;(<a href="https://developer.android.com/reference/java/lang/Runnable.html" title="class or interface in java.lang" class="externalLink" target="_top">Runnable</a>&nbsp;runnable)</pre>
<div class="block">See <a href="https://developer.android.com/reference/android/os/Handler.html#postAtFrontOfQueue(java.lang.Runnable)" title="class or interface in android.os" class="externalLink" target="_top"><code>Handler.postAtFrontOfQueue(Runnable)</code></a>.</div>
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